Are the turbos on new engines or have you turbo'd the 671 naturals...?
I have 24 x 26 props at present.. so 2" less pitch than you had. Can you remember : Were your props 3 or 4 blade, cupped or uncupped ?? According to the DD Field Service Data book, with turbos and N 90 injectors, my 671s have 325 SHP..As of now I don't see it but I'll get there. Kind Regards, Ross From: [email protected] To: [email protected] Subject: RE: [UnifliteWorld] 38C - 6/71NA Performance data. Date: Sun, 10 Oct 2010 19:55:38 -0400 You can not go by me, I am over propped now. I know when I had my naturals back in 1999 got around the 32 gph at 26x26 props. I am saving up to get new props for the turbos I have. Capt Perry From: [email protected] [mailto:[email protected]] On Behalf Of Ross Robertson Sent: Sunday, October 10, 2010 10:22 AM To: [email protected] Subject: RE: [UnifliteWorld] 38C - 6/71NA Performance data. Hi Captain Perry, good to hear from you I don't have accurate figures. I use about 100lt hr which = about 26.4 galls hr - but this is usually at 1500 rpm. I am now going for original performance ( if possible ??)as I now have the power. What size / type of props are you using...? Are you able to cruise at the figures I gave with the same WOT --.e. 19 / 22 knots ?? Look forward to hear from you, Cheers Ross From: [email protected] To: [email protected] Subject: RE: [UnifliteWorld] 38C - 6/71NA Performance data. Date: Mon, 4 Oct 2010 15:13:55 -0400 What is your fuel consumption at 1900 RPM?. If it is around 32 GPH I believe that is correct. From: [email protected] [mailto:[email protected]] On Behalf Of Ross Robertson Sent: Monday, October 04, 2010 11:42 AM To: [email protected] Subject: [UnifliteWorld] 38C - 6/71NA Performance data. Hi, In the 38C performance spec I have down loaded, it states Cruise --19 knots. Max Speed 22 knots. This I assume is with the almost standard J & T 6/71NAs in the 38Cs I cannot get near these figures. It is quietly driving me nuts. The only thing I do well is gulp diesel fuel and never get far from base....but refueling is easy near a major port -- Jakarta Back to the Spec -- for Cruise 19 knots I anticipate this is @ 1800rpm. WOT 22 kn I guess also is @ 2300 rpm. I would appreciate anyone, who has good data in this area, to be kind enough to pass on to me their rpm / speed figures. Also their prop details - Number (3 or 4 ) and type of blades ( cup or plain ) pitch and diameter. Now to the question of power. Here in Indonesia we have diesel 2, not diesel 1 as in the US of A ( I think). To take care of the power deficiency I blew the engines fitting turbo's and inter-coolers. They are working fine but I see no performance improvement. I run with just the smallest, 'happy' wisp of white smoke.. The new engine config' According to the DD manual has at least the power of the original J & T Nas So next guesstimate is I have a prop problem... Thus if a splendid 38C owner is still able to run at the spec figures in para 1 above, I would dearly like to know his or her prop dimensions and speeds at different rpm -- clean ( or dirty) bottom -- from the boonies -- Cheers Ross -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en. -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en. -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en. -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en. -- You received this message because you are subscribed to the Google Groups "UnifliteWorld" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/unifliteworld?hl=en.
